American trousers (5)
I believe the answer is:
pants
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">american trousers</span>' is the definition.<br/ ><span class="explanation-format__explanation">(the American word for trousers)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for pants that I've seen before include "longs" , "boxers?" , "American trousers" , "awful according to modern youngsters" , "Puffs, gasps" .)